namespace CSharpPro1._1030;

public abstract class UserTest
{
    public abstract void M1();
    public abstract void M2();
    public abstract void M3();
}

class Test2 : UserTest
{
    public override void M1()
    {
        return ;
    }

    public override void M2()
    {
        return ;
    }

    public override void M3()
    {
        return ;
    }
    
    
}